Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c66ae842d2b2ee…

MALICIOUS

PDF

44.3 KB Created: 2020-08-28 13:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8e961c200cfc227f52bec4ffe1f017e SHA-1: 5e6323b9f111cacfaabbdaab8ea6d71dbc870358 SHA-256: 51c66ae842d2b2ee678a27b7bf2a91a797140a32f3b15ce3e373fa802ed2197a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Cyrano de bergerac 1990 full movie' and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=cyrano+de+bergerac+1990+full+movie
    • http://files.michaelallancharles.com/uploads/1/3/1/8/131857115/zejexok.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7650/files/addition_facts_0-_20_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/dopedolupapusamaro.pdf
    • https://cdn.shopify.com/s/files/1/0434/0301/8392/files/37106336636.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/15353694410.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/wufefikivelafugezukezisu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1759/1191/files/62773252368.pdf
    • https://cdn.shopify.com/s/files/1/0461/6463/9896/files/kirubazodip.pdf
    • https://cdn.shopify.com/s/files/1/0434/4938/5126/files/76295705709.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/lolofifak.pdf
    • https://cdn.shopify.com/s/files/1/0435/6859/5112/files/84983368764.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/52983678218.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fd9.bin
198aec04c9560c2d87120da9e9bb73520327b7a6cb0d138fe1cbff453a8a8e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD9 5640 bytes
font_01_sfnt_off000072f8.bin
fc7bcde100ae97f2dba65409564afd03f346eb1eaafd8a7ec76e0b97102c2d75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F8 10320 bytes
font_02_sfnt_off00009633.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9633 4324 bytes

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